A reinforced helmet

Info
The Reinforced Helmet is a decent helmet that has maximum HP for head gear. This helmet was actually lost for years, in that the code to allow you to get it it never worked properly, and it wasn't until Wishbone fixed it up, some time in the 2000s that it was actually in the game.

The helmet and the area was written by Azatoth, and to date, the area doesn't have an official name. Some call it the Subway, others the Mall, but it's the area where Electro resides.

How to Get Them
In order to get the helmet you need an explosive. The best for this is the dynamite that Jawson carries near Electro. Once you have that, work your way through the blocking mobs protecting Electro and kill everyone's favourite source of XP (in the 90s). Head west from Electro and plant the explosive, probably best to wait outside of the room whilst that blows up.

Now head further west and you'll find some rags and garbage to search through in which you'll find a bum who is wearing the helmet. Kill him and it's yours. A very easy and quick AC10 helmet to obtain!